221200022120100 has 36 divisors (see below), whose sum is σ = 640005397335024. Its totient is φ = 58986672565280.

The previous prime is 221200022120059. The next prime is 221200022120107. The reversal of 221200022120100 is 1021220002122.

It is a Harshad number since it is a multiple of its sum of digits (15).

It is a self number, because there is not a number n which added to its sum of digits gives 221200022120100.

It is not an unprimeable number, because it can be changed into a prime (221200022120107) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 368666703234 + ... + 368666703833.

Almost surely, 2^{221200022120100} is an apocalyptic number.

221200022120100 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

221200022120100 is an abundant number, since it is smaller than the sum of its proper divisors (418805375214924).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

221200022120100 is a wasteful number, since it uses less digits than its factorization.

221200022120100 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 737333407084 (or 737333407077 counting only the distinct ones).

The product of its (nonzero) digits is 64, while the sum is 15.

Adding to 221200022120100 its reverse (1021220002122), we get a palindrome (222221242122222).

The spelling of 221200022120100 in words is "two hundred twenty-one trillion, two hundred billion, twenty-two million, one hundred twenty thousand, one hundred".